What is your definition of happiness? Do you remember how you arrived at that idea? Did you consciously make that decision or did you inherit the idea from your family? Do you compare your level of happiness to how happy people around you seem to be?
My sincere hope is, regardless of your age or station in life, you will take a moment and ponder these questions. Many of the situations in which we find ourselves are often defined by your answers. They need to be your own. Not based on the beliefs or reactions of others.